Import STEP file to Blender
You can use the STEP importer Addon, that was released for Blender 2.8x on January 27, 2020. It's an paid Addon, but not expansive and worth every cent.
You may visit the support thread on Blenderartists. There you'll find the link to get the Addon, too:
https://blenderartists.org/t/step-import/1203804